Improvement in paper-bag machines



` `N4), 119,307,` "PatentedSep- 26,1871,

Pmented Sep. 26, 1871.

UNITED STATES PATENT QEEIGE;

JAMESM. BRYANT, JOSEPH P. BRYANT, AND SAMUEL H. BRYANT, 0E TEMPER- y, ANcEvILLE, PENNSYLVANIA.

"IMPROVEMENT IN PAPER-BAG MACHINES.

Specificationvforming part of Letters Patent N o. 119,307, dated September 26, 1871.

To all 'whom @t may concern:

Be it known that we, JAMES M. BRYANT, J0- SEPH P. BRYANT, and` SAMUEL H. BRYANT, of Temperanceville, in the county of Allegheny and State of Pennsylvania, have invented a-,new and useful Improvementin Paper-Bag Machines 5 and `we do hereby declare the following to be a full,

clear, and exact description thereof, reference be ing had to `the accompanying drawing, in three Sheets, making aV part of this specification, in Which- Figure 1, Sheet l, is a side elevation of our improved machine.V Fig. 2, Sheet l, is a front sectional elevation along the line w x, Fig. l, the table being back under the former. Fig. 3, Sheet 2, is a rear elevationof the machine. Fig. 4, Sheet 2, is a detached rear elevation of the feed ing and pasting-rolls.` Fig. 5, Sheet 2, is a sectional view of the rolls through a." x', Fig. 4, and

showing one of the guides by which the paper is SheetB, illustrates the distribution of the paste on the bagblank asv eiected by the pasters on lthe feeding-rolls. Fig. 1l shows in perspective a partly-formed bag 5 and Fig. 12, Sheet 3, is a detached perspective' view of the arms which carry the discharging-rollers, and of co-operating devices.

Like letters of reference indicate like parts in the several successive steps in the manufacture are secured, as hereinafter set forth and claimed. To enable others skilled in the art to make and use our improvement, we will proceed to describe its construction and modeof operation.

The frame-work A, A1, A2, &c., is of any desired construction suitable for carryingthe dey, vices and for the operation of the machine.

Power is applied through a main driving-Shaft. B B1 is a fly-wheel. For convenience the shaft Bis arranged at the rear of the machine, just back of the horizontal bed A1, though this position may be varied at pleasure. In front of the machine are a couple of posts, A2, with suitable boxes, in which are the bearings D2 of the feedrolls D D1. bearing of the upper roll D1 to cause it to press downward with any desired force. On one end of the lower roll D is a pasting-ring, a, of lIndia rubber orother suitable material, the face of f which is a little above or outside of the face of the roll, and a like ring, al, is arranged at about the middle of the same roll. This latter ring is designed merely for feeding purposes. Under the lower orpasting-roll D is arranged a vat or box, l, for holding paste. On the face of the pasting-roll D` are the W-shaped pasters a2 a3, the outer end of the base edge of each being extended out to the end of the roll, as shown at a4.y The outer faces of these pasters a2 a3 a4 are even with the outer face of the pasting-ring a, so that all will dip into and take up paste from the vat l. The paste is prevented from coming in contact with the feeding-rin g al by means of a trough, 1.1,

directly under it. The paper is cut into sheets or blanks of the proper size, andthe sheets are fed in successively, or the paper may be fed in from a roll, and the usual appliances arranged for cutting it off in proper lengths. Such a sheet is shown in outline in Fig. 10, and the parts which are pasted or gummed by the pasters a a2 a3 a4 are shown by the shaded lines. The ring a gums the edge at m, and Jche pasters a2 vn3 n4 gum the parts marked m2, m3, and m4, respectively. The object of this distribution of the paste or gum will presently be explained. The roll D Dl may operate 4by a continuous or intermittent motion at pleasure, but we prefer the latter; and to seeure such motion we place a gear-wheel, B2, on the end of the shaft B, and on the side of the latter make a segmental gear, f, of the proper relative length, so as to get so much motion in the rolls D D1, and at the proper time, as is needed for feeding purposes. The segmental gear f meshes into a bevel gear-wheel, f1, on the end of the shaft F, and a similar wheel, f2, meshes into A spring, l2, is arranged above the a miter-wheel, f3, on the neck of the pasting-roll D. The shaft F is supported by a bearing, f4,1at its forward end, and by a post, A4, at its rear end. The blank, being thus gummed, is droppedinto a table, E, which operates in grooved sliding ways E1, and which is made open along the middle, as shown in Fig. 6, and has an intermittent reciprocating motion, by which it carries the blank forward under the former G, where, at the proper time, it leaves it and returns to the feedrollers for another blank. rlhe devices for securing this motion are shown detached in Fig. 7. On the shaft B is a post, d, which carries projectin g from the side/of its outer end a roller, d1, the two constituting mechanically a cam. This engages alternately the arms cl2 and d3, (constituting practically a cam-yoke,) so arranged as to have a lever motion. These arms d2 d3 are at or back of their point of junction, pivoted to a post, A5, of the frame-work, and the opposite end d4 (which may be called a cam-lever) is united by a connecting-rod, d5, to a bent lever, d6, which in turn is pivoted to a rock-shaft, A6, which latter has its bearings in the frame of the machine. The upper arm of the bent lever d6 is, by a connecting-rod, 6F, connected with a lug, d8, of the table E. It will now be seen that, as the camroller d1 engages alternately the oaln-arms d2 d3 through the devices described the table will move as set forth. The two halves of the table are connected together so as to have a common motion by means of a U-shaped connection, b. The bag is made on a former, G, which is of the size desired in the bag. This former is arranged horizontally and lengthwise of the machine, and so that when the blank or sheet is brought under it, as already described, by means of the table E, it (the former G) will be directly over the middle of the sheet, but with the rear end of the sheet projecting back beyond the end of the former G so that such projecting` part may be folded over the end of the former G to make the bottom of the bag. This former G has only a vertical motion. The means for securing this motion are a head-block, G1, sliding' between vertical parallel ways G2, as illustrated in Fig. 8. On the main shaft B, directly in rear of the former G, is arranged a bell-shaped cam, H, having two working sides, h, slightly concave, like the outer face of a bell, and an outer circular-working face, h1, substantially as shown. This works in a camyoke, H1, bell-mounted at its outer end h2, and bulging within as at k3. This cam-yoke H1 is rigidly aixed to the head-block G1 so that as the cam-yoke H1 goes up and down the headblock G1 and former G will receive a like motion. The object of the forms of cam and cam-yoke thus described is to cause the former G to start quick and move rapidly in both directions, and hold it stationary up or down, as the case may be, as long as possible, since it must be up long enough for the paper-sheet or blank to be fed in under it, as already described, and Vdown long enough for the folding to be done, as presently to be described. From the top'of the bed-plate A, at opposite sides of the path of the former G, risel two side-forming plates, g g, Fig. 9, which, with so much of the bed-plate A1 as is included between them, constitute a forming-box, in which the paper-bag is folded and made. The blank for the bag, being carried forward by the table E under the former G, as already described, the former G makes a downward stroke on the center of the blank and carries it down into the box formed by the side-forming plates g g and bedplate A1. Three sides of the bag are thus brought tothe shape desired. The former continues in this position (as shown in Fig. 9) till the folding is done. The table E is now free, and may at any time commence its return stroke to receive another blank from the rolls D D1. If so desired, the sideforming plates g g may be made adjustable on the bed A1 by any known mechanical device, such as slotted lugs and set-screws, for the purpose of, with a change of formers, making paper bags of different sizes. Playing across the upper edge of the side-forming plates g g are two horizontal sliding top-folders p p1. These strike edgewise against the paper of the blank, which projects up from between the side plates g g and the former G, and fold the paper over onto the top of the former G, so as to make the fourth or upper side of the bag. The topfolder p, which comes against the upwardly-projecting pasted edge of the blank, and folds it down, moves a little in advance of the other, so that the pasted or gummed edge of the blank shall be folded down first, and the other or unpasted edge on top of it. As the later-moving top folder p1 advances and folds down the unpasted edge, the first-moving top folder p, having completed its stroke, recedes, so that the later-moving folder p1 advances over onto the fold of the paper, and presses the pasted and unpasted edges well together. It then returns to its previous position. These motions are secured by a pair of spiral grooves, q1 q1, or grooved cams, as they are sometimes called, arranged on the main axle B. A wrist, q, plays in each groove, and communicates motion by a lever, q2, to a plunger, g3, to the forward end of which the topfolders 19221 are secured. The plungers g3 work in suitable bearin gs on the bed A1. The arrangement of these grooves q1 is shown in Fig. 3, but not their Obliquity, as in the position of the machine in the figure the oblique parts of the grooves are on the further side; but the construction and arrangement of Obliquity of such grooves with reference to the motions desired is well knownv to skilled machinists.

The sides being folded over and pasted together, next follows the operation of folding in the paper, which, projecting back beyond the end of the former G, is to constitute the bottom of the bag. To do this we use the folders a a1 a2 a3, of which the two a a1, that work horizontally, are pointed or V-shaped, and the other two, a2 a3, which work vertically, are, by preference,

' blunt `or square-pointed. They all move parallel with the'face of the end of the former G. The

^ two, a a1,that work horizontally, advance against the opposite sides of thelunfolded end, and press` down the middlepartscof the paper sides, as illustrated inFig, 1l, after which the upper verl tically-moving folder a? makes a downward p2, in the latter for it to work through. Next, the lower vertical folder a? makes an upward stroke, folds overthe lower fold Q12 of the bag,

advances sufficiently far (the upper folder a2 receding) to cover the overlapping ends, and press such ends well together, when the bag is complete. i

Comparing now the distribution of the paste, as shown in Fig. 10, with the form of the folds, as shown in Fig. 11, it will be seen that the paste is soapplied that all exterior overlapping parts are, when the folding is done, `pasted together. The gummy parts m2 m3, Fig. 10, constitute the inside of the parts ful e2, Fig. 11, and the parts marked m4, Fig. 10,constitute the extremity of the upper fold W21, onto which the extremity of the lower fold t2 laps, and to which it is pasted.

The devices by' which these end folders are operated commencewith four spirally-grooved wheels; or as they are sometimes called, grooved cams SV SR R1, arranged on the shaft B. In the grooves s r of each is a wrist, s1 r1, the obliquity of the'grooves being such as to give the motion desired.` From the wrists r1 of the grooved cams R R1 the levers r2 extend forward and upward under the bed of the machine, Fig.

2, to which they are pivoted; thence forward,` `and at their forward ends ,theyare connected by rods `ri tolugs r4 ofthe folders a c1: These folders are guided intheir stroke by the stems c4, to

`which they are fastened.` To operate the top vertical folder a2, a lever, `s2, Fig. 3, leads from `thewrist `s1 of the grooved cam Sto a vertical shaft, s3, which is free to vibrate. From the upper end of this shaft a lever, s4, leads to the bent lever S5, Fig. 9, the forward end of which is fast cned to a swinging lug, ss, attached to the folder a2, the object of the swinginglug s6 being merely to leave the folder a2 free to move vertically in its slides u u.

A similar arrangement of devices, except that it is inverted, leads from the grooved cam S1 to the lower vertical folder a3, as illustrated in Fig. 3, the lettering being the same as for the corresponding devices of the upper vertical folder.

As soon as the folders have allreturned to their original positions, the former G, with. the

' l now perfectly formed bag thereon, rises clear of i the box in whichit was made till it comes befalls to the floor through the opening E2, Fig. 6,

able air-hole, m1, at or near its base.

time, has brought a new blank from the feed- `rolls D D.

To furnish a supply of air between the bottom of the bag and the end of the former G, I run -one or more perforations, w m, lengthwise through the former G from its forward end to any suitrlhe same result may be secured by making a longitudinal groove or grooves in one or morefaces of the former G.

. The discharging-rollers o o are operated by band o1 and band-wheels o2 o2 suitably-arranged. Thegear-wheels O 0 communicate power from the wheel B2 on the shaft B to al shaft, O1, on which the driving-band wheels 02 O2 are arranged.- The rollers o o are carried on arms o3, which extend back and are pivoted to the same posts G2, which act as sliding ways to the headblock G1, Fig. 8. This feature is more particularly shown in Fig. 12, Sheet 3. The arms o3 are made in the form of bent levers, with an extension, o4, projecting back of the posts. A spring, o5, connects them together in such a way as to keep the adjacent faces of the rollers 0 at a greater distance apart than the breadth of the former G, except when the former G is in position for the discharge of the bag, as in Fig. 7. Then the same motion that carries the headblock G1 and former G upwards, also brings up a pair of wedges or inclines', w w, which engage the projections o4, force them back-which n10- tion causes the rollers o to approach each otherand engage the bag on the former G, and, by frictional contact, discharge the bag, as already set forth. Also, for use with different-sized form- 'ers in making different-sized bags, they may be made adjustable by any known mechanical means.

If it be desired to print the bag on one side, it can be done while the bag is being formed by inserting a form or stereotype containing the type or engraving or design to be printed in the bottom of the box in which the folding is being done; or the ordinary bed-plate of a printingpress may be arranged so as to constitute the bottom of the box at the time of folding, aird in such case the pressure required in printing may be applied in any known way.

What we claim as our invention, and-desire to secure by Letters-]?atent, is-

- 1. A pair of feeding and pasting-rolls, D D1,

oneroll, D, being provided with raised W- shaped i pasters a2 n3, a pasting-ring, n, and feeding-ring n1, substantially as described.

` 2. A paste-vat, l, arranged under the feeding and pasting-roll D, so that the paste-ring 'n and pasters n2 r1.3 n4 shall dip therein, andl with a transverse trough, Z1, under the feeding-ring nl, substantially as set forth.

3. The arrangement of the feed-rollers D D, reciprocating feed-table E, vertically moving former G, and top and end sliding folders, con structed and combined relatively to each other, substantially as described.

4. The vertically-moving former G, operated by and in combination with the cam-y oke H and cam H, the yoke H being bell-mouthedend enlarged back, substantially as shown, so as to receive a quick throw and be held stationary during' the greater part of the time of the operation of the machine.

5. The bent arms os o4, carrying the rollers o o at their forward ends, in combination With inelines or Wedges w w, for causing the rollers to 

